was/were加现在分词是什么时态
作系动词：
现在分词、动名词短语作表语：
The film was moving.
His job was teaching English .
过去分词作表语：
We were moved.
不定式作表语：
1）有to不定式：His work that day was to clean the blackboard.
2) 无to 不定式：What he should do is clean the blackboard.
作系动词：
现在分词、动名词短语作表语：
The film was moving.
His job was teaching English .
过去分词作表语：
We were moved.
不定式作表语：
1）有to不定式：His work that day was to clean the blackboard.
2) 无to 不定式：What he should do is clean the blackboard.
